Bushing for electric wiring.



1.1. DUCK.

BUSHING FOR ELECTRIC WIRING.

APPLlCATlON FILED MAY 12. 1912.

1,251,487. Patented Jan. 1, 1918.

INVENTUH JOHN J. DUCK, F TOLEDO, OHIO.

BUSHING FOE. ELECTRIC WIRING.

To all whom it may concern:

Be it known that 1, JOHN J. DUCK, a citizen of the United States, and a resident of Toledo in the county of Lucas and State of Ohio, have invented a certain new and useful Bushing for Electric Wiring; and I.

do hereby declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompany ing drawings, and to the characters of refer encemarked thereon, which form a part of this specification.

This invention relates to bushings for the wire receivin openings of switch boxes, outlet boxes, p ates, etc,- used in connection with electric wiring, and has for its object the provision of a simple, inexpensive and improved bushing of this character, which is capable of being easily and quickly snapped into place within an opening from one side of the wall in which disposed.

The invention is fully described in the following specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in which" I Figure 1 is a perspective view of an outlet box with the openings thereof through which the electric wires pass provided with a bushing embodying the invention. Fig. 2 is an enlarged perspective view of one of the bushings, and Fig. 3 is a central sectional view thereof. j

Referring to the drawings,'l designates an outlet box for electric wiring, the walls of which box are provided with a plurality of knock-outs 2 closing openings through which electric wires 3 may be passed, as well understood in the art.

I to inwardly roll the edge wall of the opening 6 to avoid a sharp or cutting edge. A

flange 7 projects from the inner side of the Specification of Letters Patent.

Application filed lay 12, 1917. Serial No. 168,268.

t is customary to mount bushings in these openings to pre-. vent the insulated covering of wires from. having contact with the sharp edge walls" Patente d Jan. 1, 191a.

collar'5 in inwardly spaced relation to its outer edge and in the general direction of its axis, and flares outward and then rolls mward to provide an outer rounded edge to prevent. cutting a wire covering resting thereagainst. The flange 7 is split, prefer.-

ably in' several places, to adapt it to be' contracted under a radial compressing strain. The inner end of the flange is of a diameter tobe re'ceived by an opening in an outlet box or the like, while the flared portion of the flange is slightly larger in diameter than such opening and requires compressing to enter the opening. The

flange 7 being only slightly larger at its flared portion than a box opening, is adapted to be compressed and the bushing snapped into osition in an opening or removed there rom by pressure against one end or' the other of the bushing, asis apparent, the

outer projecting edge of the collar serving as a stop for limitingthe inserting movement of the bushing.

It is evident that T have provided a bushing which is simpleand inexpensive in its construction and isfcapable of being easily and quickly inserted into an opening from I either side thereof or removed therefrom.

It is also evident that the bushing, when applied to an opening in a plate or box wall,- does not project to any considerable extent from either side thereof but is substantiallyflush therewith, which is an important feature in many wiring jobs'not only on account of appearancebut also for economy of space.

I .wish, it understood that invention is not limited to any specific-construction,

arrangement or form of the parts, as it is capable of numerous modifications without de arting from the spirit of the claims. I

raving thus described my invention, what 1 claim as new, and desire to secure by Letters Patent, is-

l. A bushing of the class described, come prising a collar having a compressible flange projecting from one side thereof for forcible unsertion into an opening, said collar having a wire receiving opening therethrough.

2. A bushing of the class described, com

rising a wire receivin collar havin a compressible flange projectingfrom one side thereoffor forcible insertion'into an opening, said collar having a portion at its outer edge extended without said flange.

a a bushing r the class described, etaprising a wire receiving collar having a ing a split compressible flange flaring outcompressible flange flaring outward in inward from one side of the collar ad acent 1o wardly spaced relation to the outer edge to its outer edge and then rolling inward in of the collar to adapt it to be snapped into rentrant form, said flange adapted to; be 5 a receiving opening. Y snapped into a receiving opening.

4. A bushing of the class described, com In testimony whereof, I have hereunto prising a, Wire receiving collar having the signed my name to this specification. edge wall of its opening rounded and hav- JOHN J. DUCK. 

